Ch 25

Question 1

The following conditions must be met for the Hardy-Weinberg Equilibrium to hold:

Answer 1

Random mating
Allele frequencies are the same in males and females.
All genotypes are equally fit
There is no mutation or migration
The population is infinitely large

Question 2

Non-random mating

Answer 2

changes genotype frequencies from H-W predictions without changing allele frequency

Question 3

Only _____ makes a population better adapted (more fit) to its environment

Answer 3

natural selection

Question 4

____ is the ultimate source of genetic variation

Answer 4

Mutation

Question 5

Genetic drift

Answer 5

random fluctuation in allele frequency between generations.

small populations.

a powerful evolutionary force.

Question 6

The mechanisms of the ____ are the same as for a ____:

Answer 6

founder effect
genetic botttleneck

sampling error coupled with genetic drift of a small population

Question 7

inbreeding coefficient, F, that can vary from

Answer 7

0 – 1

Question 8

Inbreeding does not change

Answer 8

allele frequency

Question 9

_____ is the only directed evolutionary force

Answer 9

Natural selection

Question 10

Increases genetic variation within populations

Answer 10

Mutation

Migration

Question 11

Increases genetic variation between populations

Answer 11

Mutation

Genetic Drift

Question 12

Decreases genetic variation within populations

Answer 12

Genetic Drift

Question 13

Decreases genetic variation between populations

Answer 13

Migration